I think that slot is probably designed for SSDs instead of HDDs. SSDs are significantly slimmer and would fit there without fouling the side panel. From the promotional material I can see of your case, it looks like it comes with a cage designed to hold 3.5" HDDs - to fit this drive properly you’ll need a caddy to adapt it to fit that, and install it into there instead.

Hello I’m a trans person from the UK here to tell you this is sadly not the case at all.